I noticed some bugs affecting Pawn drops in Yonin Shogi, so I thought I'd fix them. The fixed .lud file can be found below.
- Two Pawns - The current ludeme only enforces this along columns from P1's perspective. If my understanding of the rule is correct, it should be enforced from each player's perspective, just like the last rank restriction for Pawns. With some help from dale walton, I was able to fix the issue.
- Drop Pawn Mate - The current ludeme only enforces this when the moved tries to checkmate the next player to move. If my understanding of the rule is correct, checkmates for Pawn drops should not be possible at all. I was able to fix this by myself.
- 1991 Setup - P4's Bishop and Rook are currently in the wrong places. This is now fixed.